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    <link rel="stylesheet" href="style.css" />
    <title>喝水</title>
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  <body>
    <h1>喝水</h1>
    <h3>目标:2升</h3>
    <div class="cup">
      <div class="remained" id="remained">
        <span id="liters">2升</span>
        <small>差</small>
      </div>
      <div class="percentage" id="percentage"></div>
    </div>

    <p class="text">选择您喝了多少杯水</p>

    <div class="cups">
      <div class="cup cup-small">250 ml</div>
      <div class="cup cup-small">250 ml</div>
      <div class="cup cup-small">250 ml</div>
      <div class="cup cup-small">250 ml</div>
      <div class="cup cup-small">250 ml</div>
      <div class="cup cup-small">250 ml</div>
      <div class="cup cup-small">250 ml</div>
      <div class="cup cup-small">250 ml</div>
    </div>
    <script src="script.js"></script>
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